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NEC_PRACTICE NEC 2023

NEC Code Questions Practice Test-20

Take a Practice test on NEC Code Practice quiz questions - 20

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NEC Practice Tests

How this test works

Read each question carefully

Look for absolute words like always / never — they often distinguish the right answer.

Manage your time

You have 14 min for 9 questions. Skip tough ones and come back.

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Review your answers

After submitting you'll see every explanation and your NEC references.

How to Use This Practice Test

This NEC Code Questions Practice Test-20 has 9 questions with detailed answers and NEC references. Take the full test, review every wrong answer, and look up the NEC article it references before moving on.

Tip: Mixed-format test — questions jump between topics just like the real exam. Don't spend more than 90 seconds on any one question.

Topics covered: All NEC chapters — branch circuits, grounding, conductors, wiring methods, motors, and more.
Passing score: Aim for 80%+ consistently before scheduling your exam.
Questions: 9 multiple-choice, one correct answer each

9

Questions

14 min

Time

70%

Pass

Timer starts immediately. Progress is auto-saved.

NEC Code Questions Practice Test-20 — Question List

Question 1: What is the maximum voltage drop that is recommended by NEC for branch conductor and feeder conductor?

3 %
5 %
8 %
4 %

Question 2: What is the minimum load that is required for exterior sign or outline lightening for a commercial occupancy as per NEC?

12000 VA
18000 VA
15000 VA
21000 VA

NEC Reference: NEC 220.14(F)

Question 3: A cord and plug device used as disconnecting means for a motor must be rated for ..................

Horsepower
voltage
Resistance
Current

NEC Reference: NEC 430.109(F)

Question 4: A 2400 volts motor disconnecting means must be capable of being locked in the .....................

closed position
Open position
ON position
Both open and close position

NEC Reference: NEC 430.227

Question 5: If the branch circuit rating more than ................., the lamp holders connected to it should be of the heavy duty type.

20 amperes
25 amperes
40 amperes
45 amperes

NEC Reference: NEC 210.21(A)

Question 6: All 15 or 20 amperes receptacle outlets installed in bathrooms of dwelling units must always require .............................

Non ground recetacles
water proof receptacles
protective gaurds
Ground fault circuit interceptor ( GFCI)

NEC Reference: NEC 210.8(A)(1)

Question 7: How much power consumed by 240 volts circuit that draws 30 amperes current?

7.2 KW
5.2 KW
8.5 KW
9.3 KW

Question 8: For conductors supplying portable signs in a dry location what is the maximum length in feet allowed?

16
12
15
8

NEC Reference: NEC 600.10(D)(2)

Question 9: For a commercial kitchen with two electrical equipment, what demand factor is allowed?

100 %
80 %
70 %
90 %

NEC Reference: NEC 220.56

EXAM CARD NEC_PRACTICE

Questions9

Time limit14 min

Pass score70%

Code editionNEC 2023

DifficultyIntermediate

Last reviewedJun 2026

Timer starts immediately. Progress is auto-saved.

Source: NEC 2026 (NFPA 70)